US7526182B2 - Editing apparatus and editing method - Google Patents

Editing apparatus and editing method Download PDF

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Publication number
US7526182B2
US7526182B2 US11/231,988 US23198805A US7526182B2 US 7526182 B2 US7526182 B2 US 7526182B2 US 23198805 A US23198805 A US 23198805A US 7526182 B2 US7526182 B2 US 7526182B2
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Prior art keywords
stream data
mpeg
header
pack
data
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Expired - Fee Related, expires
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US20060078290A1 (en
Inventor
Manabu Shibutani
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Toshiba Corp
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Toshiba Corp
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/85—Television signal recording using optical recording on discs or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/806—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal
    • H04N9/8063—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal using time division multiplex of the PCM audio and PCM video signals

Definitions

  • the present invention relates to an editing apparatus and an editing method of video data, and more specifically, to an editing apparatus and an editing method for editing system streams and program streams of an MPEG standard.
  • MPEG Motion Picture Experts Group
  • the MPEG standard along the expansion of its applications and the release of new compression technologies, has had some versions, and those used mainly at present are MPEG-1, MPEG-2 and MPEG-4.
  • MPEG-1, MPEG-2 and MPEG-4 There are many hardware items for encoding audio/video data into these MPEG data.
  • VideoES VideoElementaryStream
  • AudioES audio compressed data
  • MPEG1SystemStream hereinafter, MPEG-1 SS
  • MPEG2ProgramStream hereinafter, MPEG-2 PS
  • MPEG-2 encoders released recently have functions to encode VideoES and AudioES as MPEG-1 stream data, however, with regard to the multiplexing methods, many of them do not cope with MPEG-1 SS, but cope with only MPEG-2 PS.
  • MPEG-2 encoders released recently have functions to encode VideoES and AudioES as MPEG-1 stream data, however, with regard to the multiplexing methods, many of them do not cope with MPEG-1 SS, but cope with only MPEG-2 PS.
  • MPEG-2 PS data encoded by such MPEG-2 encoders as the above, which has been a problem in the prior art.
  • An object of the present invention is to provide an editing apparatus and an editing method that analyze MPEG-2 PS data items output from MPEG-2 encoders, and reconstruct data items, thereby converting the MPEG-2 PS data into MPEG-1 SS data.
  • an editing apparatus which edits first stream data of a first format and comprises means for analyzing a header of the first stream data; means for creating a header of second stream data of a second format based on an analysis result by the analyzing means; and means for converting the first stream data into the second stream data by use of the header of the second stream data created by the creating means.
  • a method for editing first stream data of a first format comprises a step of analyzing a header of the first stream data; a step of creating a header of second stream data of a second format based on an analysis result by the analyzing step; and a step of converting the first stream data into the second stream data by use of the header of the second stream data created by the creating step.
  • FIG. 1 is a block diagram showing the structure of a recording/reproducing apparatus as an embodiment of an editing apparatus according to the present invention
  • FIG. 2 shows the structure of audio/video data
  • FIG. 3 shows the structure of a pack
  • FIG. 4 shows the structure of a PES packet header of MPEG-2 PS
  • FIG. 5 is a flow chart for explaining the flow of data conversion
  • FIG. 6 is a flow chart for explaining the flow of analysis of a pack of MPEG-2 PS
  • FIG. 7 shows the structure of a pack header of MPEG-2 PS
  • FIG. 8 is a flow chart for explaining the flow of calculations of the value necessary for creating data of MPEG-1 SS;
  • FIG. 9 is a flow chart for explaining the flow of creation of a packet header of MPEG-1 SS.
  • FIG. 10 is a flow chart for explaining the flow of creation of a pack of MPEG-1 SS
  • FIG. 11 is a flow chart for explaining the flow of creation of a pack header of MPEG-1 SS;
  • FIG. 12 shows the structure of the pack header of MPEG-1 SS
  • FIG. 13 is a flow chart for explaining the flow of creation of the packet header of MPEG-1 SS;
  • FIG. 14 is a flow chart for explaining the flow of creation of a padding packet of MPEG-1 SS.
  • FIG. 15 is a figure showing the structure of the padding packet of MPEG-1 SS.
  • FIG. 1 is a block diagram showing the structure of a recording/reproducing apparatus according to an embodiment of the present invention.
  • the recording/reproducing apparatus has its main structural components of a hard disk drive (HDD) 20 , a disk drive 35 which rotates and drives an optical disk 10 as an information storage medium such as a DVD (Digital Versatile Disk) or the like in which video files are structured, and reads and writes information from/to the optical disk 10 , an encoder unit 50 which configures a recording unit, a decoder unit 60 which configures a reproducing unit, and a microcomputer block 30 which controls the operations of the device main structural components.
  • HDD hard disk drive
  • a disk drive 35 which rotates and drives an optical disk 10 as an information storage medium such as a DVD (Digital Versatile Disk) or the like in which video files are structured, and reads and writes information from/to the optical disk 10
  • an encoder unit 50 which configures a recording unit
  • a decoder unit 60 which configures a reproducing unit
  • the encoder unit 50 has an analog digital converter (ADC) 52 , encoders 53 including a video (V) encoder, an audio (A) encoder and a sub picture (SP) encoder, a formatter 56 which makes outputs of the respective encoders a specified format, and a buffer memory 57 .
  • ADC analog digital converter
  • V video
  • A audio
  • SP sub picture
  • analog digital converter 52 To the analog digital converter 52 , external analog video signals and external analog audio signals from an A/V input unit 42 , or analog TV signals and analog audio signals from a television (TV) tuner 44 are input.
  • A/V input unit 42 To the analog digital converter 52 , external analog video signals and external analog audio signals from an A/V input unit 42 , or analog TV signals and analog audio signals from a television (TV) tuner 44 are input.
  • TV television
  • a data processor 36 under the control of the microcomputer block 30 , supplies DVD record data output from the encoder unit 50 to the disk drive 35 , and takes in DVD reproducing signals reproduced from the optical disk 10 from the disk drive 35 , and rewrites control information recorded in the optical disk 10 , and deletes data recorded in the optical disk 10 .
  • the microcomputer block 30 includes a micro processing unit (MPU), a ROM which stores a control program and the like, and a RAM which provides work areas necessary to execute programs.
  • MPU micro processing unit
  • ROM read-only memory
  • RAM random access memory
  • the micro processing unit of the microcomputer block 30 in conformity with a control program of the present embodiment stored in the ROM thereof, uses the RAM as its work area, and executes editing, fault place detection, non recorded area detection, recorded information recording position setting, UDF recording, A/V address setting and so forth.
  • the decoder unit 60 has a separator 62 which separates and takes out audio packs, video packs, and the like from video information having a pack structure, a memory 63 used at execution of pack separation and other signal processes, decoders 64 including a video (V) decoder which decodes main picture data separated by the separator 62 , a sub picture (SP) decoder which decodes sub picture data separated by the separator 62 , and an audio (A) decoder which decodes audio data separated by the separator 62 , and a video processor 66 which appropriately composes sub picture data obtained from the sub picture decoder and main picture data obtained from the video decoder, and outputs menus, subtitles and other sub pictures to be overlapped on main pictures.
  • V video
  • SP sub picture
  • A audio
  • the output of the audio decoder is output via an interface (I/F) 75 to the outside, and in the case of analog output, the output is analog converted via a selector 76 by a digital analog converter (DAC) 77 and output to the outside.
  • the selector 76 according to a select signal from the microcomputer block 30 , selectively outputs either signals which are input from the TV tuner 44 or the A/V input unit 42 via the analog digital converter 52 , or signals which are input from the decoders 64 .
  • Analog audio signals are supplied to an external component (2-channel to 6-channel multi channel stereo device) not illustrated therein.
  • a key input unit 11 has buttons of play, stop, record, skip, fast forward, reverse, slow, and enter key and the like, and by pressing down these buttons, a user may operate the present recording/reproducing apparatus, record data to the hard disk drive 20 or the rewritable optical disk 10 , and reproduce and edit recorded video data.
  • FIG. 2 shows the structure of audio/video data (stream) that the present recording/reproducing apparatus handles.
  • the structure of audio/video data is the same in both MPEG-2 PS format and MPEG-1 SS format, and several pieces of unit called pack configure the data.
  • pack There are kinds of pack, and a pack in which video is recorded is a video pack, and one in which audio is recorded is an audio pack.
  • FIG. 3 shows the structure of a pack.
  • a pack is structured by a pack header and one or more packets. There are kinds of packet, and in a packet (called PES packet in MPEG-2) in which video and audio are recorded, following the packet header, an elementary stream as video and audio compressed data is recorded.
  • a padding packet is a packet for adjusting the length of a pack.
  • Each pack is assumed to include a PES packet, or a PES packet and a padding packet.
  • the packet header of the PES packet is assumed to be of a data row of the representative PES packet header of MPEG-2 PS as shown in FIG. 4 . And it is assumed that in the PES packet of the video pack and the audio pack at the start of audio/video data, the value of PES_extension_flag shown in FIG. 4 is always 1.
  • FIG. 4 shows the structure of a PES packet header of MPEG-2 PS
  • FIG. 7 shows that of a pack header of MPEG-2 PS
  • FIG. 9 shows that of a packet header of MPEG-1 SS
  • FIG. 12 shows that of a pack header of MPEG-1 SS
  • FIG. 15 shows that of a padding packet.
  • FIG. 5 is a flow chart showing the outline of the entire flow of conversion from MPEG-2 PS data into MPEG-1 SS data.
  • the microcomputer block 30 reads the audio/video data recorded in the hard disk drive 20 via the data processor 36 to the work area RAM in unit of pack (step S 51 ).
  • the main CPU of the data processor 36 analyzes the information in the pack (step S 52 ), and creates a new pack multiplexed by the MPEG-1 SS format in the work area RAM (step S 53 ).
  • the created pack is written via the data processor 36 and the disk drive 35 into the optical disk 10 (step S 54 ).
  • the above operations are performed to all the packs of the audio/video data, thereby, it is possible to convert the data multiplexed by the MPEG-2 PS format into the data multiplexed by the MPEG-1 SS format and write the data into the optical disk 10 .
  • the flow chart in FIG. 6 shows the flow to analyze the pack of MPEG-2 PS read to the work RAM (step S 52 in FIG. 5 ).
  • step S 61 and S 62 From the pack header of MPEG-2 PS having the structure shown in FIG. 7 , the value of 3-bit SCR_base and the value of 22-bit program_mux_rate are acquired (steps S 61 and S 62 ).
  • the PES packet header of MPEG-2 PS having the structure shown in FIG. 4 is analyzed. From the PES packet header, the values of stream_id, PES_packet_length, PTS_flag, DTS_flag, and PES_header_data_length are acquired (steps S 63 , S 64 , S 65 , and S 66 ).
  • step S 67 and S 68 If it is found that PTS exists from the value of PTS_flag, the value of PTS is acquired (steps S 67 and S 68 ).
  • DTS_flag If it is found that DTS exists from the value of DTS_flag, the value of DTS is acquired (steps S 69 and S 70 ).
  • FIG. 8 is a flow chart for calculating the values necessary to configure a pack of MPEG-1 SS format, by use of the values acquired in the analysis on a pack of MPEG-2 PS format.
  • An ES start address is the first address at which the elementary stream appears in a pack of MPEG-2 PS, by the position from the start of the pack.
  • the ES start address is obtained by adding the pack header (14 bytes) of MPEG-2 PS shown in FIG. 7 , a field F 41 (9 bytes) in the packet header of MPEG-2 shown in FIG. 4 , and PES_header_data_length (step S 81 ).
  • ES size is the size of the elementary stream included in a pack of MPEG-2 PS.
  • the ES size is obtained by subtracting the ES start address from the sum of the pack header (14 bytes) of MPEG-2 PS shown in FIG. 7 , the field F 42 (6 bytes) in the packet header of MPEG-2 shown in FIG. 4 , and PES_packet_length (step S 82 )
  • Valid size is the size of the other field than a padding area and a stuffing area in a pack of MPEG-1 SS to be created from now.
  • the valid size is obtained by adding the pack header (14 bytes) and a field F 28 (6 bytes) in FIG. 9 and the ES size (step S 83 ).
  • step S 65 in FIG. 6 If the value of PTS_flag acquired in step S 65 in FIG. 6 is 1, it is necessary to insert PTS to the packet of MPEG-1 SS, therefore, 5 is added to the valid size (steps S 84 and S 85 ).
  • step S 65 in FIG. 6 If the value of DTS_flag acquired in step S 65 in FIG. 6 is 1, it is necessary to insert DTS to the packet of MPEG-1 SS, therefore, 5 is added to the valid size (steps S 86 and S 87 ).
  • step S 90 The value obtained by subtracting the valid size from the pack size 2048 bytes becomes invalid size (step S 90 ). If the invalid size is smaller than 8 bytes, the stuffing area is inserted into the pack of MPEG-1 SS, thereby the entire pack size is made into 2048 bytes. Accordingly, the stuffing size is set to the invalid size, and the padding size is set to 0 (steps S 91 , S 92 and S 93 ).
  • the invalid size is 8 bytes or more
  • a padding packet is inserted into the pack of MPEG-1 SS, thereby the entire pack size is made into 2048 bytes. Accordingly, the stuffing size is set to 0, and the padding size is set to the invalid size (steps S 94 and S 95 ).
  • Packet length is the value that becomes packet_length of the packet of MPEG-1 SS. This value is obtained by subtracting the padding size from the value (2300 bytes) obtained by subtracting from the pack length 2048 the pack header (12 bytes) of MPEG-1 SS shown in FIG. 12 and a field F 28 (6 bytes) of the packet header of MPEG-1 SS shown in FIG. 9 .
  • FIG. 10 is a flow chart showing the flow of pack creation of MPEG-1 SS format (step S 53 in FIG. 5 ).
  • step S 101 the packet header is created (step S 102 ), and the elementary stream is created (step S 103 ). If the padding size obtained in step S 93 or S 95 in FIG. 8 is larger than 0, a padding packet is created (step S 105 ).
  • the data created herein are to be arranged sequentially from the start in the area of 2048 bytes arranged in the work area RAM for a new pack creation.
  • FIG. 11 is a flow chart showing the flow of the pack header creation (step S 101 in FIG. 10 ).
  • pack_start_code shown in a field F 11 in the pack header of MPEG-1 SS shown in FIG. 12 is created (step S 111 ).
  • step S 112 With the value of SCR_base acquired in step S 61 in FIG. 6 as SCR, a field SCR shown in a field F 12 in the pack header of MPEG-1 SS shown in FIG. 12 is created (step S 112 ).
  • step S 63 the field shown in a field F 13 in the pack header of MPEG-1 SS shown in FIG. 12 is created (step S 63 ).
  • FIG. 13 is a flow chart showing the packet header creation of MPEG-1 SS (step S 102 in FIG. 10 ).
  • step S 131 the field shown in a field F 21 in the packet header of MPEG-1 SS shown in FIG. 9 is created (step S 131 ).
  • step S 132 By use of the packet size acquired in step S 96 in FIG. 8 , packet_length of a field F 22 in the packet header of MPEG-1 SS shown in FIG. 9 is created (step S 132 ).
  • step S 92 or S 94 in FIG. 8 If the staffing size calculated in step S 92 or S 94 in FIG. 8 is larger than 0, stuffing_byte of a field F 23 in the packet header of MPEG-1 SS shown in FIG. 9 is created for the number of the staffing size (steps S 133 and S 134 ).
  • step S 65 in FIG. 6 If the value of PTS_flag acquired in step S 65 in FIG. 6 is 1, then by use of PTS acquired in step S 68 in FIG. 6 , a field F 25 in the packet header of MPEG-1 SS shown in FIG. 9 is created (steps S 137 and S 138 ).
  • step S 65 in FIG. 6 If the value of DTS_flag acquired in step S 65 in FIG. 6 is 1, then by use of DTS acquired in step S 130 in FIG. 6 , a field F 26 in the packet header of MPEG-1 SS shown in FIG. 9 is created (steps S 139 and S 140 ).
  • step S 103 in FIG. 10 the elementary stream area is created.
  • the elementary stream in the original MPEG-2 PS pack is copied to the elementary stream area of the pack of MPEG-1 SS.
  • step S 93 or S 95 in FIG. 8 If the padding size obtained in step S 93 or S 95 in FIG. 8 is larger than 0, a padding packet is created (steps S 104 and S 105 in FIG. 10 ).
  • FIG. 14 is a flow chart showing the flow of padding packet creation (step S 105 in FIG. 10 ).
  • packet_start_code shown in a field F 31 in the padding packet shown in FIG. 15 is created (step S 141 ).
  • the packet_length shown in a field F 32 in the padding packet shown in FIG. 15 is created by the value obtained by subtracting the padding packet header length (6 bytes) from the padding size (step S 142 ).
  • 0xff data is created for the size indicated by the value of packet_length (step S 143 ).
  • the pack header and the packet header of original data are analyzed, and the pack header and the packet header of multiplexed data of MPEG-1 SS format are configured, and the pack header and the packet header of MPEG-1 SS are added before the elementary stream of MPEG-2 PS, and the padding packet is added later if necessary, therefore, it is possible to perform data conversion without changing the pack size before and after the conversion. Therefore, it is possible to reproduce multiplexed data encoded by MPEG-2 encoders by software that operates on a personal computer and corresponds only to MPEG-1 format.
  • the present invention can be practiced as a computer readable recording medium in which a program for allowing the computer to function as predetermined means, allowing the computer to realize a predetermined function, or allowing the computer to conduct predetermined means.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
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US20060268354A1 (en) * 2005-05-31 2006-11-30 Rodgers Stephane W Method and system for sharing AV/record resources in a programmable transport demultiplexer and PVR engine
US20070081790A1 (en) * 2005-10-07 2007-04-12 Via Technologies, Inc. Method for converting data format

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JP2006094415A (ja) * 2004-09-27 2006-04-06 Toshiba Corp 映像装置及び映像ストリーミング方法
KR100788685B1 (ko) * 2006-03-10 2007-12-26 삼성전자주식회사 데이터 스트림 포맷의 변환 방법 및 장치, 이를 이용한데이터 스트림 기록 방법 및 장치
US8521006B2 (en) * 2010-05-06 2013-08-27 Intel Corporation Boundary detection in media streams
WO2012108919A2 (en) * 2011-02-11 2012-08-16 Intel Corporation Media stream over pass through mechanism

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JPH1079917A (ja) 1996-09-04 1998-03-24 Hitachi Ltd データ再生及び記録装置
JP2003151215A (ja) 2001-11-09 2003-05-23 Toshiba Corp フォーマット変換を行う情報記録装置及び情報処理装置
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JPH09139937A (ja) 1995-11-14 1997-05-27 Fujitsu Ltd 動画ストリーム変換装置
JPH1079917A (ja) 1996-09-04 1998-03-24 Hitachi Ltd データ再生及び記録装置
JP2003151215A (ja) 2001-11-09 2003-05-23 Toshiba Corp フォーマット変換を行う情報記録装置及び情報処理装置
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Publication number Priority date Publication date Assignee Title
US20060268864A1 (en) * 2005-05-31 2006-11-30 Rodgers Stephane W System and method for providing data commonality in a programmable transport demultiplexer engine
US20060268354A1 (en) * 2005-05-31 2006-11-30 Rodgers Stephane W Method and system for sharing AV/record resources in a programmable transport demultiplexer and PVR engine
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